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Matchstate

Change-matchstate

Modifying constructor for matchstate structures.

Syntax

(change-matchstate x 
                   [:index <index>] 
                   [:backrefs <backrefs>])

This is an often useful alternative to make-matchstate.

We construct a new matchstate structure that is a copy of x, except that you can explicitly change some particular fields. Any fields you don't mention just keep their values from x.

Definition

This is an ordinary change- macro introduced by defprod.

Macro: change-matchstate

(defmacro change-matchstate (x &rest args)
  (std::change-aggregate 'matchstate
                         x args
                         '((:index . matchstate->index)
                           (:backrefs . matchstate->backrefs))
                         'change-matchstate
                         'nil))